冬小麦水分利用效率

冬小麦水分利用效率

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Initial contribute: 2018-12-04

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岳天祥编著
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yue@lreis.ac.cn
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Method-focused categoriesData-perspectiveGeostatistical analysis
Method-focused categoriesProcess-perspectiveBiological process calculation

Detailed Description

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冬小麦水分利用效率

(1) 冬小麦水分利用效率:作物群体水分利用效率可由田间CO2通量(Fc)与蒸散量(ET)之比计算

               

式中,ET为蒸散量Rn为入射净辐射G为土壤热通量;λ为汽化潜热为波文比;Cp为定压比热,ρ是空气密度;ρa为干空气密度;θ为平均气温(K;W是空气湿度(质量混合比)。

(2) 植物的水分利用效率:根据Fick扩散定率,水汽和CO2通量可由浓度梯度和扩散阻力来描述,则植物的水分利用效率可表达为:

         

式中,C为叶-CO2浓度差;e为叶-气水汽压差;是水汽扩散的边界层阻力;是水汽扩散的气孔阻力;CO2在叶片内扩散的叶肉阻力。

参考文献:

    李俊,于沪宁,刘苏峡:冬小麦水分利用效率及其环境影响因素分析。地理学报,1997,526

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《资源环境数学模型手册》 (2018). 冬小麦水分利用效率, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/ac30265f-2da2-4669-8d1c-e27a647113de
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Initial contribute : 2018-12-04

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Authorship

:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
View
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History

Last modifier
wzh
Last modify time
2020-11-06
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